(b) The magnitude of acceleration vector a of pointProblem 9.5 Consider an arbitrarily shaped object udrcular motion with a linear ya rotational motion in the xy-plane (Fig. 9.36). LetObepoints P, N, and M will move along their circular path.points on the object located at distances r, 0.5 1, andthe xy-plane along the axis of rotation, and P,N, and Marespectively. Due to the rotational motion of the dConsider a Carnot heat-engine cycle executed in a closed system using 0.025 kg of steam as theworking fluid. It is known that the maximum absolute temperature in the cycle is twice theminimum absolute temperature, and the net work output of the cycle is 60 kJ. If the steamchanges from saturated vapor to saturated liquid during heat rejection, determine thetemperature of the steam during the heat rejection process.65°F ClearDELL13 m/s, and thepath indetermine:(a) The angular velocity a of point Plocated at distance r froma uDetermine the time elapsed barlanding (), the height of thehe floor at the point of releabove the floor (H).A aneCuoint Pis 71 - 45Answers: t =0.8 s; h=2

Answered: Image /qna-images/answer/6a05e1f7-70a6-4b5c-81f6-2e1a3062cebe.jpg

Answered: Consider a Carnot heat-engine cycle…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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A heat engine is operating on a Carnot cycle and has a thermal efficiency of 55 percent. The waste heat from this engine is rejected to a nearby lake at 60°C at a rate of 900 kJ/min. Determine the temperature of the source.
An air conditioner with R-134a as the working fluid is used to keep a room at 23°C by transferring excess heat to the outside air, which is at 37°C. Through the windows and walls, the room's thermal energy increases by 250 kJ/min while the heat generated in electrical devices accounts for 900 W. The working fluid flows into the compressor at 400 kPa as saturated steam at a rate of 100 liters/min and flows out at 1200 kPa and 70°C.a) Calculate the air conditioning power factor, COPR.b) Calculate the maximum possible power factor an air conditioner could have under these conditions.c) Calculate the volume flow of the refrigerant at the inlet to a compressor, which would have the maximumthe possible power factor (which you calculated in b) and the same conditions at the compressor inlet and outletlike the original compressor.
Rooms with floor areas of up to 15-m2 are cooled adequately by window air conditioners whose cooling capacity is 5000 Btu/h. Assuming the COP of the air conditioner to be 3.5, determine the rate of heat gain of the room, in Btu/h, when the air conditioner is running continuously to maintain a constant room temperature.
Consider a thermal machine that follows the Otto cycle. It is known that the efficiency of that machine can be improved. From the following statements: 1. It can be improved and this occurs if the value of efficiency approaches 1. 2. Efficiency can be improved by decreasing the compression ratio. 3. Higher efficiency can be obtained by increasing the temperature difference at which the machine operates. 4. Higher efficiency can be obtained than that of a Carnot machine operating at the same minimum and maximum temperatures. Which are correct? a) 1 and 2 b) 1 and 4 c) 1 and 3 d) 2 and 4
A refrigerator uses R-134a as the working fluid and operates on an ideal vapor compression cycle between 0.14 MPa and 0.8 MPa. If the mass flow rate of the refrigerant is 0.06 kg/s, determine (a) the rate of heat removal from the refrigerated space, (b) the power input to the compressor, (c) the heat rejection rate in the condenser, and (d) the COP.
A heat engine operates between two reservoirs at 200°C and 20°C. One-half of the work output of the heat engine is used to drive a compressor of a refrigeration system, which is used to cool the chiller in a factory. (ii) The compressor is able to increase the temperature of the working fluid R134a from 0°C, x = 0.5 to 20°C, x = 1. Determine the COP of this refrigeration system, given mass flow rate of R-134a to be 0.01 kg/s.
The heat pump with a power input of 2000 kw draws heat from a heat source at 70° C and gives heat to a boiler. Thanks to the heat given to the boiler, the saturated liquid water entering the boiler at 300 kPa pressure leaves the boiler as saturated steam at 300 kPa (3bar) pressure. Since the performance of the heat pump (y = COPe) is equal to 0.5 times the performance of the Carnot heat pump operating under the same temperature conditions, find the mass flow rate (kg / s) of the water flowing from the boiler. Note: The boiler works according to the open system SASA model. Changes in kinetic and potential energies for the boiler are negligible.
In a gas turbine, the temperature of the working fluid at inlet to the compressor is 289 K and outlet 438 K. At inlet to the turbine, the working fluid has a temperature of 1,064 K and exhausts from the turbine at a tempeature of 739 K. The specific heat capacity of the working fluid at constant pressure is 1.005 kJ/kg.K. Determine the efficiency of the plant
When a man returns to his well-sealed house on a summer day, he finds that the house is at 35°C. He turns on the air conditioner, which cools the entire house to 20°C in 36 min. If the COP of the air-conditioning system is 2.8, determine the power drawn by the air conditioner. Assume the entire mass within the house is equivalent to 800 kg of air for which cy= 0.72 kJ/kg °C and cp = 1.0 kJ/kg-°C. 35°C 20°C W A/C The power drawn by the air conditioner is kW.
Q2-Consider a Carnot heat-engine cycle executed in a steady-flow system using steam as the working fluid. The cycle has a thermal efficiency of 30 percent, and steam changes from saturated liquid to saturated vapor at 275°C during the heat addition process. If the mass flow rate of the steam is 3 kg/s, determine the net power output of this engine

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